Material for binding plaster to concrete surfaces.



W. A STOETZER.

I MATERIAL FOR BINDING PLASTER T0 CONCRETE SURFACES.

APPLICATION FILED 050.31. 1914.

1,152,69. PatentedSept. 7, 1915.

WITNESSES 11v VENTOR.

A TTORNE Y.

WILLIAM A. STOETZER, 0F WHEELING, WEST VIRGINIA.

MATERIAL FOR BINDING'PLASTER T0 CONCRETE SURFACES.

Specification of Letters Patent.

Application filed December @1. 1914. Serial No. 879,830.

To all whom it may concern:

Be it known that I, WILLIAM A.. S'ronrznn, a citizen of the United States of America, and a resident of \Vheeling, county of Ohio, and State of West Virginia, have invented certain new and useful Improvements in Material for Binding Plasterto Concrete Surfaces, of which the following is a specification.

This invention relates broadly to means for causing plaster to adhere to concrete surfaces, and more specifically to a material 01 binding a plaster coating to such suraces.

Hitherto much difliculty has been encountered in so applying plaster coatings to concrete surfaces that they will closely adhere, due to the fact that such surfaces are necessarily more or less smooth and, consequently, no satisfactory means is afiorded for binding the plaster thereto or for causing the plaster to firmly unite or bond therewith.

It is the object of the present invention, therefore, to provide in a commercially available and applicable form a binder, or binding material, by means of which a close bond between the concrete surface and a plaster coatingmay be obtained; or, in other words, to provide means whereby a plaster coating may be firmly bound to a concrete surface.

In describing the invention in detail, reference is herein had to the accompanying drawings, forming a part of this specification, in which- Figure 1 is an edge view of the invention, showing the' same attached to the inner face of a. form for concrete and illustrating the manner of its application to a concrete surface which is to be plastered; Fig. 2 is a similar view showing the form removed, and illustrating a portion of the paper backing of my binder removed preparatory to applying a plaster coating; Fig. 3 is a sectional view showing a plaster coating applied, and illustrating the use ofthe binder; and Fig. 4 is an inner face view of a fragmentary portion of the article which constitutes my invention. 7

The invention comprises, essentially, a flexible backing 1, preferably of paper, to

one face of which is applied a loosely tangled or matted mass of a suitable fibrous material 2, as animal hair, wood fiber, or cork fragments, said material being caused to adhere lightly to the paper by a suitable adhesive substance.

In practice, the paper backing 1 is applied to the form in which the concrete is to be poured, being lightly attached to the inner face of that side 3 of said form which, when the concrete wall is formed, faces the surface to be plastered, as shown in Fig. 1. In this position, the loose portions of the fiber or other material 2 carried by the paper 1 project into the mold space and become embedded in the cement 4: when the latter is poured, as shown in Figs. 1, 2 and 3. When the form is removed, the fibers and paper baclnng, adhering to the surface of the concrete, strip from said form. Then, to prepare the concrete surface for the reception of a plaster coating, the paper backing is stripped oif, leaving the loose ends or other portions of the fibers 2 projecting outward from said surface, as shown in Fig. 2. When the plaster coating 5 is applied, said projecting portions of the fibers receive and become embedded in said coating, as shown in Fig. 3. Thus, the fibers serve to firmly bind said coating to the concrete surface.

It will be understood that the coating of fibers carried by the paper backing may be as heavy or as light as desired. Experimentation has shown, however, that a very thin or light fiber coating will suffice.

As is obvious, the paper backing constitutes the means by which the fibers are maintained in properly distributed position during the formative period of the concrete; further, such backing is required to constitute an article having a form adapted for handling in a commercial way. The

article is adapted to be put up and marketed either'in strips or squares of a convenient size, or in rolls, preferably the latter.

What is claimed is 1. As an article of manufacture, a backing of thin material having a covering of fibrous material lightly adhering to one face thereof.

2. As an article of manufacture, a paper backing having disposed in lightly adhering relation to one face thereof a loosely tangled mass of fibrous material.

3. A binder of the character described, comprising a flexible paper backing, and a mass of scattered thread like fibers disposed in lightly adhering relation to one face of said backing.

Patented Sept. 7, 1915.

4. binder by means of 'which a plaster adapted to be stripped from said"fibers 'be- I coating may be closely bonded to a concrete fore the application of said coating. 10'

I surface, said binder comprising a. flexible lntestimony whereof, I-aflix my signature backing, and a mass of scattered fibers disin presenceof two subscribing witnesses.

5. posed in lightly oadhering relation to one WILLIAM A. STOETZER. face of said bacln'ng, the free ends of said Witnesses:

fibers being adapted to become embedded H. E. 'DU'NLAP,

in the concrete, and said'backing being 'W. F. KEEPER. 

